Frequencies for first 10,000 rows of pct012e044 variable in sf12000860us20 dataset :

   41 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,750       97.50       97.50
          1 |        226        2.26       99.76
          2 |         20        0.20       99.96
          3 |          2        0.02       99.98
          4 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017